I've heard stories about the catch breaking more than standard bolt catches. Have you run into issues with durability? I'm thinking of SBRing my PSA Colt lower but worry about the longer bolt catch.

The 'finger' portion of the bolt catch is not the part that generally breaks, so I don't see how it would be effected one way or the other. My suggestion is you short stroke the buffer via a longer buffer, delrin spacer, etc. so that the bolt catch is either not activated at all, or buffer has minimal travel past it. Momentum is what breaks catches.

FWIW I added a Colt long finger bolt catch to a RRA lower about 10 years ago, no issues.

Started out with a RRA 9mm buffer, then added quarters for a spacer and currently run an 8 oz dedicated buffer and a stronger buffer spring.

I think as long as you limit the overtravel then breakage isn’t a concern.

The reason a bolt catch will break is typically because the pocket in the lower that it sits in is too wide (front to back), and it is allowed to move forward enough that the side where the spring is will contact the lower and cause it to break at the roll pin hole.

Reducing over travel can help, but your best bet is to find a lower/bolt catch that fit together properly, or shim the pocket to make sure the bolt catch can't move enough to break.

This is why some guns never break bolt catches with or without a spacer and others break bolt catches occasionally or frequently.